-LRB- CNN -RRB- -- `` Let me tell you a little about me . ''

`` Farouk1986 '' introduced himself to a Muslim online community with these words in February 2005 .

`` My name is Umar but you can call me Farouk , '' the poster continues , detailing biographical information that appears to match the life of Umar Farouk AbdulMutallab , the 23-year-old Nigerian man accused of attempting to detonate an explosive on an international flight into Detroit , Michigan , on Christmas Day .

The failed terror plot put airports on high alert and refocused American attention on al Qaeda in the Arabian Peninsula , which claimed responsibility for the attempted attack .

Internet postings for Farouk1986 -- apparently a combination of his name and birth year -- reveal a young man who fought feelings of loneliness and struggled with balancing his life as a Muslim with the temptations of the secular world around him . He wrote about his desire to attend university , possibly in the United States , and his thoughts on love and marriage .

Officials have not confirmed that Internet postings by Farouk1986 were made by AbdulMutallab , but the many detailed biographical points made by the poster match what has been reported about AbdulMutallab 's life .

`` I will describe myself as very ambitious and determined , especially in the deen , '' Farouk1986 wrote in February 2005 , referring to the Islamic way of life . The poster writes about being in boarding school , with possibilities of attending Stanford University or the University of California-Berkeley .

Eventually , AbdulMutallab studied mechanical engineering at University College London .

Besides being ambitious , Farouk1986 also described himself as lonely .

`` First of all , I have no friend -LSB- s -RSB- , '' he wrote in another online post with informal , imperfect grammar . `` Not because I do not socialise -LRB- sic -RRB- , etc but because either people do not want to get too close to me as they go partying and stuff while I do n't . or they are bad people who befriend me and influence me to do bad things .

`` i have no one to speak too , no one to consult , no one to support me and i feel depressed and lonely . i do not know what to do . ''

Somewhere along the way , AbdulMutallab turned toward Islamic extremism .

An FBI official said AbdulMutallab was included in the U.S. government 's Terrorist Identities Datamart Environment , or TIDE , after his father warned the U.S. Embassy in Nigeria of his son 's hard-line beliefs and possible ties to militant Islamists . But his name was not pulled from that database and included on lists barring him from U.S.-bound aircraft .

Part of the explosive device that failed to take down last week 's flight from Amsterdam , Netherlands , was sewn into AbdulMutallab 's underwear , authorities said . A preliminary FBI analysis found the device contained pentaerythritol tetranitrate , an explosive also known as PETN .

Investigators were having trouble determining what the accelerant AbdulMutallab allegedly tried to use to light the explosives because `` the syringe was pretty much destroyed , '' a law enforcement source told CNN .

All 300 passengers and crew onboard the Christmas Day flight have been interviewed by authorities , the source said , adding that he expected no one else to be held or charged in connection with the incident .

Farouk1986 's online posts show that as early as 2005 , he had a serious view of his religion . One of his struggles , the poster wrote , was that the `` loneliness leads me to other problems . ''

Farouk1986 said after fasting , `` I felt a shield that prevented evil thoughts coming into my head . I felt closer to Allah . ''

Being lonely awakened sexual desires that he struggled to control , he said , sometimes `` leading to minor sinful activities like not lowering the gaze . '' His religion instructed him to fast to avoid such temptation , but it did n't seem to be working , Farouk1986 said .

In another online post soon afterward , though , he took his comment back .

CNN 's Alden Mahler Levine and CNN Homeland Security Correspondent Jeanne Meserve contributed to this report .

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Biographical details in posts by `` Farouk1986 '' match reports of Umar Farouk AbdulMutallab 's life

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Posts reveal young man who struggled to balance Islam with temptations of the secular world

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`` i have no one to speak too , no one to consult , no one to support me ... i do not know what to do ''

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AbdulMutallab is accused of attempting to detonate explosive on flight to U.S. on Christmas